12664579864 has 64 divisors (see below), whose sum is σ = 24466406400. Its totient is φ = 6143553024.

The previous prime is 12664579841. The next prime is 12664579877. The reversal of 12664579864 is 46897546621.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12664579799 and 12664579808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19573989 + ... + 19574635.

It is an arithmetic number, because the mean of its divisors is an integer number (382287600).

Almost surely, 2^12664579864 is an apocalyptic number.

It is an amenable number.

12664579864 is a deficient number, since it is larger than the sum of its proper divisors (11801826536).

12664579864 is a wasteful number, since it uses less digits than its factorization.

12664579864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1188 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 12664579864 in words is "twelve billion, six hundred sixty-four million, five hundred seventy-nine thousand, eight hundred sixty-four".